Do Now – 4 minutes  Define epidemic  What do you know about the obesity epidemic in America?

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Presentation transcript:

Do Now – 4 minutes  Define epidemic  What do you know about the obesity epidemic in America?

ANATOMY Unit Two: Building Blocks of Life

What are we learning today?  Our goal for today is to learn about the structure and function of lipids  Our goal for this YEAR is  80% mastery of material  3 point increase on our ACT

Lipids Sources  Commonly known as... FATS  Butter  Cheese  Oils  Peanut butter  Nuts  Fish  Meat

Lipids Roles  Long-term energy storage  Insulation and cushioning  Cell Membranes  Hormones  Cholesterol

Lipids Structure  ALL LIPIDS ARE HYDROPHOBIC (they hate water!)  This is why they don’t mix with water when you go to wash your hands  Three types  Regular lipids  Phospholipids  Steroids

 What are lipids made of?  Regular lipids..  One glycerol group  Three fatty acids

What are lipids made of?  Phospholipids  One glycerol group  2 fatty acids + 1 phosphate group  Why is this important?  The outside of the cell is hydrophilic (likes water)  The inside of the cell is hydrophobic (dislikes water)  This makes for great MEMBRANES!

What are lipids made of?  Steroids  4 fused carbon rings  Examples  Cholesterol  Found in cell membranes  Hormones  Testosterone

Lipids Structure  Unsaturated: Double bonds between carbon, liquid at room temp  Polyunsaturated (manydouble bond)  Monounsaturated (only one double bond  Saturated: Single bonds between carbon, solid at room temp, least healthy!

Special Notes  Trans fats unsaturated fats that are HUMAN MADE  Your body doesn’t know how to deal with them!  They are BAD for you!!!

Major Food Sources of Trans Fat for American Adults  (Average Daily Trans Fat Intake is 5.8 Grams or 2.6 Percent of Calories)

Impact of the American diet  This study starts in 1985 – just before you were born

Obesity Trends* Among U.S. Adults BRFSS, 1985 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1986 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1987 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1988 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1989 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1990 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1991 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1992 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1993 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1994 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1995 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1996 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1997 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1998 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 1999 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 2000 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

Obesity Trends* Among U.S. Adults BRFSS, 2001 Source: Mokdad A H, et al. J Am Med Assoc 1999;282:16, 2001;286:10.

In Class Activity  Read article out loud  Make a list of types of fats, how much they should be eaten, and where they come from

Homework  None!